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A: ensemble average of simulated EMG in the 8 muscles from heel strike (0%) to subsequent heel strike (100%). Note that RF and TA have a 2nd burst ∼60% into the gait cycle. Note that the ensemble average was similar for all 3 coupling conditions (positive, negative, and 0) and almost overlap completely. B: ensemble average of EMG for the 8 muscles from 6 healthy adults during treadmill walking at 1.1 m/s. The gray bands indicate 1 SE (across-participant).
